/* ========== 全局重置 & 变量 ========== */
:root {
    --primary: #d97706;
    --primary-dark: #b45309;
    --primary-light: #f59e0b;
    --bg-light: #fef9e7;
    --bg-dark: #1e293b;
    --text-dark: #1e293b;
    --text-muted: #64748b;
    --white: #ffffff;
    --shadow: 0 10px 40px rgba(0,0,0,0.08);
    --radius: 16px;
    --radius-sm: 10px;
    --transition: 0.3s ease;
}
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
html {
    scroll-behavior: smooth;
}
body {
    font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    background: var(--white);
    color: var(--text-dark);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}
a {
    text-decoration: none;
    color: inherit;
}
img {
    max-width: 100%;
    display: block;
}
ul {
    list-style: none;
}
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}
.section {
    padding: 80px 0;
}
.bg-light {
    background: var(--bg-light);
}
.section-title {
    text-align: center;
    margin-bottom: 48px;
}
.section-title h2 {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-dark);
}
.section-title p {
    font-size: 1.1rem;
    color: var(--text-muted);
}
/* ========== 按钮 ========== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    border: 2px solid transparent;
    cursor: pointer;
    transition: var(--transition);
    justify-content: center;
}
.btn-primary {
    background: var(--primary);
    color: var(--white);
    border-color: var(--primary);
}
.btn-primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(217,119,6,0.35);
}
.btn-outline {
    background: transparent;
    color: var(--white);
    border-color: var(--white);
}
.btn-outline:hover {
    background: var(--white);
    color: var(--primary-dark);
    transform: translateY(-2px);
}
.btn-block {
    width: 100%;
}
.btn-sm {
    padding: 8px 18px;
    font-size: 0.9rem;
}
/* ========== 头部导航 ========== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(255,255,255,0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(0,0,0,0.05);
    transition: var(--transition);
}
.header-flex {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}
.logo {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 8px;
}
.logo i {
    font-size: 1.8rem;
}
.main-nav ul {
    display: flex;
    gap: 32px;
}
.main-nav a {
    font-weight: 500;
    color: var(--text-dark);
    transition: var(--transition);
    padding: 6px 0;
    border-bottom: 2px solid transparent;
}
.main-nav a:hover,
.main-nav a.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}
.hamburger {
    display: none;
    background: none;
    border: none;
    font-size: 1.7rem;
    color: var(--text-dark);
    cursor: pointer;
}
/* ========== Hero ========== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    background: linear-gradient(135deg, #1e293b 0%, #334155 40%, #b45309 100%);
    color: var(--white);
    overflow: hidden;
}
.hero-overlay {
    position: absolute;
    inset: 0;
    background: url('data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iNjAiIGhlaWdodD0iNjAiIHZpZXdCb3g9IjAgMCA2MCA2MCIgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIj48ZyBmaWxsPSJub25lIiBmaWxsLXJ1bGU9ImV2ZW5vZGQiPjxnIGZpbGw9IiNmZmYiIGZpbGwtb3BhY2l0eT0iMC4wNSI+PHBhdGggZD0iTTM2IDM0djItSDI0di0yaDEyek0zNiAyNHYySDI0di0yaDEyeiIvPjwvZz48L2c+PC9zdmc+');
    opacity: 0.3;
}
.hero-content {
    position: relative;
    z-index: 2;
    max-width: 700px;
}
.hero-content h1 {
    font-size: 3.2rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
}
.hero-content .highlight {
    background: linear-gradient(90deg, #f59e0b, #d97706);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 32px;
    opacity: 0.9;
    max-width: 560px;
}
.hero-btns {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 40px;
}
.hero-stats {
    display: flex;
    gap: 32px;
    flex-wrap: wrap;
}
.hero-stats span {
    font-size: 1rem;
    background: rgba(255,255,255,0.12);
    padding: 8px 18px;
    border-radius: 30px;
    backdrop-filter: blur(4px);
}
.hero-stats strong {
    font-size: 1.3rem;
    margin-right: 4px;
}
/* ========== 品牌优势 ========== */
.brand-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 28px;
}
.brand-card {
    background: var(--white);
    padding: 32px 24px;
    border-radius: var(--radius);
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid rgba(0,0,0,0.04);
}
.brand-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 50px rgba(0,0,0,0.1);
}
.brand-card i {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 16px;
}
.brand-card h3 {
    margin-bottom: 8px;
    font-size: 1.3rem;
}
.brand-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
}
/* ========== 项目网格 (前台) ========== */
.menu-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 28px;
}
.menu-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 28px 22px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid rgba(0,0,0,0.04);
    display: flex;
    flex-direction: column;
}
.menu-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 18px 45px rgba(0,0,0,0.1);
}
.menu-card .card-icon {
    font-size: 2.6rem;
    color: var(--primary);
    margin-bottom: 12px;
}
.menu-card .card-category {
    display: inline-block;
    background: var(--bg-light);
    padding: 4px 14px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--primary-dark);
    margin-bottom: 10px;
    width: fit-content;
}
.menu-card h3 {
    font-size: 1.4rem;
    margin-bottom: 6px;
}
.menu-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    flex: 1;
    margin-bottom: 14px;
}
.menu-card .card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid #f0f0f0;
    padding-top: 14px;
}
.menu-card .price {
    font-weight: 700;
    color: var(--primary);
    font-size: 1.1rem;
}
/* ========== 加盟流程 ========== */
.steps-flex {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    justify-content: center;
}
.step-item {
    background: var(--white);
    border-radius: var(--radius);
    padding: 32px 22px;
    text-align: center;
    flex: 1 1 180px;
    max-width: 240px;
    box-shadow: var(--shadow);
    position: relative;
    transition: var(--transition);
}
.step-item:hover {
    transform: translateY(-4px);
}
.step-num {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary);
    color: var(--white);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.1rem;
}
.step-item i {
    font-size: 2rem;
    color: var(--primary);
    margin: 16px 0 12px;
}
.step-item h3 {
    font-size: 1.2rem;
    margin-bottom: 6px;
}
.step-item p {
    color: var(--text-muted);
    font-size: 0.9rem;
}
/* ========== 合作案例 ========== */
.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 28px;
}
.testi-card {
    background: var(--white);
    padding: 28px 24px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
}
.testi-card:hover {
    transform: translateY(-4px);
}
.testi-stars {
    color: #f59e0b;
    margin-bottom: 14px;
    font-size: 1.1rem;
}
.testi-card p {
    font-style: italic;
    color: var(--text-dark);
    margin-bottom: 16px;
}
.testi-author {
    font-weight: 600;
    color: var(--primary-dark);
}
/* ========== 联系表单 ========== */
.contact-form {
    max-width: 600px;
    margin: 0 auto;
    background: var(--white);
    padding: 40px 32px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}
.form-row {
    display: flex;
    gap: 16px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}
.form-row input,
.form-row select {
    flex: 1;
    min-width: 180px;
    padding: 14px 18px;
    border: 2px solid #e2e8f0;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    transition: var(--transition);
    background: var(--white);
}
.form-row input:focus,
.form-row select:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(217,119,6,0.15);
}
.contact-form textarea {
    width: 100%;
    padding: 14px 18px;
    border: 2px solid #e2e8f0;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    resize: vertical;
    margin-bottom: 16px;
    font-family: inherit;
}
.form-tip {
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 12px;
}
/* ========== 页脚 ========== */
.site-footer {
    background: var(--bg-dark);
    color: #cbd5e1;
    padding-top: 48px;
}
.footer-flex {
    display: flex;
    flex-wrap: wrap;
    gap: 40px;
    justify-content: space-between;
    padding-bottom: 32px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand .logo {
    color: var(--primary-light);
    margin-bottom: 12px;
    display: inline-flex;
}
.footer-brand p {
    font-size: 0.95rem;
    margin-top: 8px;
}
.footer-links h4,
.footer-contact h4 {
    color: var(--white);
    margin-bottom: 16px;
    font-size: 1.1rem;
}
.footer-links ul li {
    margin-bottom: 8px;
}
.footer-links a {
    transition: var(--transition);
}
.footer-links a:hover {
    color: var(--primary-light);
}
.footer-contact p {
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.social-icons {
    display: flex;
    gap: 14px;
    margin-top: 12px;
}
.social-icons a {
    font-size: 1.4rem;
    transition: var(--transition);
    color: #94a3b8;
}
.social-icons a:hover {
    color: var(--primary-light);
}
.footer-bottom {
    text-align: center;
    padding: 20px 0;
    font-size: 0.9rem;
    color: #64748b;
}
.footer-bottom a {
    color: var(--primary-light);
}
/* ========== 后台入口 ========== */
.admin-entry {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 999;
}
.admin-entry a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--bg-dark);
    color: var(--white);
    font-size: 1.3rem;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    transition: var(--transition);
    opacity: 0.6;
}
.admin-entry a:hover {
    opacity: 1;
    transform: scale(1.1);
}
/* ========== 后台管理页面样式 ========== */
.admin-page {
    background: #f1f5f9;
    min-height: 100vh;
}
.admin-login {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #1e293b, #334155);
}
.login-card {
    background: var(--white);
    padding: 40px 32px;
    border-radius: var(--radius);
    width: 360px;
    max-width: 90%;
    box-shadow: 0 20px 60px rgba(0,0,0,0.2);
}
.login-card h2 {
    text-align: center;
    margin-bottom: 28px;
    color: var(--text-dark);
}
.input-group {
    display: flex;
    align-items: center;
    border: 2px solid #e2e8f0;
    border-radius: var(--radius-sm);
    padding: 0 14px;
    margin-bottom: 18px;
    background: var(--white);
}
.input-group i {
    color: var(--text-muted);
    font-size: 1.1rem;
    margin-right: 10px;
}
.input-group input {
    border: none;
    flex: 1;
    padding: 14px 0;
    font-size: 1rem;
    background: transparent;
}
.input-group input:focus {
    outline: none;
}
.error-msg {
    color: #dc2626;
    font-size: 0.9rem;
    text-align: center;
    margin-top: 12px;
    min-height: 24px;
}
/* 后台面板 */
.admin-panel {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px;
}
.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 28px;
    background: var(--white);
    padding: 16px 24px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}
.admin-header h2 {
    font-size: 1.4rem;
}
.admin-toolbar {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
}
.admin-hint {
    color: var(--text-muted);
    font-size: 0.85rem;
}
.admin-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 20px;
}
.admin-card {
    background: var(--white);
    border-radius: var(--radius-sm);
    padding: 20px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.06);
    transition: var(--transition);
    cursor: default;
    border: 1px solid #e2e8f0;
}
.admin-card:hover {
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
}
.admin-card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 10px;
}
.admin-card-header i {
    font-size: 1.8rem;
    color: var(--primary);
}
.admin-category {
    background: #fef3c7;
    padding: 2px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    color: #92400e;
}
.admin-card h4 {
    font-size: 1.2rem;
    margin-bottom: 4px;
}
.admin-card p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 12px;
}
.admin-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid #f0f0f0;
    padding-top: 12px;
}
.admin-card-actions {
    display: flex;
    gap: 8px;
}
.btn-icon {
    background: none;
    border: none;
    font-size: 1.1rem;
    cursor: pointer;
    padding: 6px 8px;
    border-radius: 8px;
    transition: var(--transition);
    color: var(--text-muted);
}
.btn-icon:hover {
    background: #f1f5f9;
    color: var(--primary-dark);
}
/* 弹窗 */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    backdrop-filter: blur(4px);
}
.modal-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 32px;
    width: 440px;
    max-width: 92%;
    box-shadow: 0 30px 80px rgba(0,0,0,0.3);
    max-height: 90vh;
    overflow-y: auto;
}
.modal-card h3 {
    margin-bottom: 20px;
    font-size: 1.4rem;
}
.modal-card label {
    display: block;
    font-weight: 600;
    margin-top: 14px;
    margin-bottom: 4px;
    font-size: 0.9rem;
}
.modal-card input,
.modal-card select {
    width: 100%;
    padding: 12px 14px;
    border: 2px solid #e2e8f0;
    border-radius: var(--radius-sm);
    font-size: 1rem;
}
.modal-card input:focus,
.modal-card select:focus {
    border-color: var(--primary);
    outline: none;
}
.modal-btns {
    display: flex;
    gap: 12px;
    margin-top: 24px;
    justify-content: flex-end;
}
/* ========== 响应式 ========== */
@media (max-width: 768px) {
    .main-nav {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        background: rgba(255,255,255,0.98);
        backdrop-filter: blur(12px);
        padding: 20px 24px;
        border-bottom: 1px solid #e2e8f0;
        display: none;
    }
    .main-nav.open {
        display: block;
    }
    .main-nav ul {
        flex-direction: column;
        gap: 16px;
    }
    .hamburger {
        display: block;
    }
    .hero-content h1 {
        font-size: 2.2rem;
    }
    .hero-stats {
        gap: 16px;
    }
    .section-title h2 {
        font-size: 1.8rem;
    }
    .form-row {
        flex-direction: column;
    }
    .form-row input,
    .form-row select {
        min-width: auto;
    }
    .footer-flex {
        flex-direction: column;
        gap: 28px;
    }
    .admin-grid {
        grid-template-columns: 1fr;
    }
    .modal-card {
        padding: 24px;
    }
}
@media (max-width: 480px) {
    .hero-content h1 {
        font-size: 1.8rem;
    }
    .hero-btns {
        flex-direction: column;
    }
    .btn {
        width: 100%;
        justify-content: center;
    }
}